• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.7
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• pp.1428-1436
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• 2012

This paper presents the delta image composition methods using Depth-Image-Based Rendering (DIBR) for 3D stereoscopic broadcasting for the low bandwidth mobile DMB broadcasting system. With DIBR, a left and depth images are transmitted to a mobile device, which restores the right view, whose quality may be poor. This paper describes delta image composition methods for the restoration while minimizing the amount of the transmitted data.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.5
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• pp.1194-1200
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• 2014

One of problems in car navigation systems is that a number of inputs are required for a directions search. This may even causes a car accident due to poor concentration while driving. In order to solve the issue we design and implement a safe and easy-to-use car navigation system which allows a driver to look up directions with just a single tap. Our smartphone app creates an NFC tag by deriving location information from a text, voice, GPS, and so on. The driver can then get the directions by just tapping a phone or card with the Tag on the navigation system. We show the feasibility and effectiveness of our system by comparing our implementation with the existing car navigation systems.

• Korean journal of food and cookery science
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• v.14 no.1
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• pp.124-132
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• 1998

The purpose of this study was to evaluate the performance and importance of dietitians' role in order to provide basic information for an efficient foodservice management. This approach was achieved using a variety of quantitative and qualitative informations including general foodservice management, dietitian's role performance and importance. A survey of 453 office and factory foodservices was undertaken and detailed information was collected. Statistical analysis of data was performed using SAS package program for descriptive analysis, 1-test, $\chi$$^2$ test, and analysis of variance. The general characteristics of the dietitians were that 80.20% were aged between 20∼29 and 66.49 had work experience with less than 5 years. And 61.68% were graduated from college. The Importance-Performance Analysis (IPA) technique was used for obtaining information of dietitian's foodservice management practices. By the results of the IPA technique, foodservice attributes with fair to poor performance and high impotance was service management for customer satisfaction. The average scores of dietitian's role performance and importance were 3.33 and 4.03 out of 5, respectively. Dietitians with work experience more than 10 years and aged more than 30 years old had more work performance than those.

• Journal of Advanced Marine Engineering and Technology
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• v.40 no.8
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• pp.726-732
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• 2016

Clustering analysis is widely used in data mining to classify data into categories on the basis of their similarity. Through the decades, many clustering techniques have been developed, including hierarchical and non-hierarchical algorithms. In gene profiling problems, because of the large number of genes and the complexity of biological networks, dimensionality reduction techniques are critical exploratory tools for clustering analysis of gene expression data. Recently, clustering analysis of applying dimensionality reduction techniques was also proposed. PCA (principal component analysis) is a popular methd of dimensionality reduction techniques for clustering problems. However, previous studies analyzed the performance of PCA for only full data sets. In this paper, to specifically and robustly evaluate the performance of PCA for clustering analysis, we exploit an improved FCBF (fast correlation-based filter) of feature selection methods for supervised clustering data sets, and employ two well-known clustering algorithms: k-means and k-medoids. Computational results from supervised data sets show that the performance of PCA is very poor for large-scale features.

• Journal of Internet Computing and Services
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• v.8 no.3
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• pp.1-7
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• 2007

Since the DirectTV started its digital broadcasting services in 1994 for the first time in the U.S., digital broadcasting widened its services in many areas. In korea, TIT(Transport Information Technology) based IP-TV services have been provided in Saemaeul trains and some sections of subway trains. But the software systems for the service performed in alternated fashions and suffered from many problems such as suspension, memory leaking and overflow. These problems increased playback loss time and resulted in bad reliabilities. In this paper, a software TIT monitor is designed and implemented for the TIT system in physically poor environments. The designed system formalized monitoring time intervals for effective monitoring. Through the real experiments, playback time is improved in 14% comparing to existing system.

• The Journal of the Korea Contents Association
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• v.16 no.4
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• pp.624-633
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• 2016

Although a number of information is emerging in the big data era and studies on the infographic studies for delivering it effectively are becoming an issue, the visualization study on the numerical information delivered through the credit card statement is very poor compared to its importance. The effective visualization method following each information characteristics was by analyzing the numerical information types focusing on the credit card statement. The type of the figure information classified into the comparative analysis, progress of time change, proportion, relationship, scope, and distribution, and it was made into the graph form proper to the nature of each information to study the most effective and ideal visual form. Therefore, this study is significant because it suggests a control point of the visualization by pointing out an effective visual form for delivering the numerical information that appears on the credit card statement with the figure characteristics.

• JSTS:Journal of Semiconductor Technology and Science
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• v.3 no.2
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• pp.63-68
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• 2003

The DC and RF characteristics of $In_{0.5}Ga_{0.5}P/In_{0.22}Ga_{0.78}As/GaAs$ p-HEMTs with a gate oxide layer of various thicknesses ($50{\;}{\AA},{\;}300{\;}{\AA}$) were investigated and compared with those of a Schottky-gate p-HEMT without the gate oxide layer. A prominent improvement in the breakdown voltage characteristics were observed for a p-HEMT having a gate oxide layer, which was implemented by using a liquid phase oxidation technique. The on-state breakdown voltage of the p-HEMT having the oxide layer of $50{\;}{\AA}$was ~2.3 times greater than that of a Schottky-gate p-HEMT. However, the p-HEMT having the gate oxide layer of $300{\;}{\AA}$ suffered from a poor gate-control capability due to the drain induced barrier lowering (DIBL) resulting from the thick gate oxide inspite of the lower gate leakage current and the higher on-state breakdown voltage. The results for a primitive p-HEMT having the gate oxide layer without any optimization of the structure and the process indicate the potential of p-HEMT having the gate oxide layer for high-power applications.

• Korean Journal of Human Ecology
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• v.19 no.2
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• pp.343-359
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• 2010

The purpose of this study is to analyze college students' TV advertising information recognition, comprehension and affecting factors on them. Data were collected by a survey of college student consumers after experiments with TV commercials. ANOVA, Duncan, and stepwise multiple regression analysis were carried out with the gathered data. The results are as follows. First, the TV advertising information comprehension degree of the college students consumers were shown to be low, by 41.2%. The comprehension degree was especially low when the information was presented visually without any verbal expression. Second, assuming that the comprehension of TV advertisements is defined by a correct perceptual understanding after recognizing the consumer-deception factors, the percentage of correct answers was poor, by 29.2%. Third, according to sex, average monthly income, degree of immersion on TV commercials, advertisement attitude, and consumer education of school, the TV advertisement information recognition and comprehension showed varying degrees between the groups. In the case of women students whose average monthly income was 100 to 300 thousand Korean won, had a high degree of immersion on TV commercials, and a high degree of consumer education at school, the TV advertising information recognition was shown to be high. In the case of third year college students who had a medium level of immersion on TV commercials and a high degree of consumer education at school, the TV advertisement comprehension was high. Fourth, the high explanatory factor of TV advertising information recognition and comprehension was found to be common because of consumer education at school.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.32A no.1
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• pp.152-158
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• 1995

Eteching characteristics of the Indium Tin Oxide (ITO), which is transparent conductor, was investigated with CH4/H2 and Ar as etching gases for the Reactive Ion Etching (RIE). With CH4/H2 for the etching gas, the highly selective etching characteristics for the ITO on GaAs was obtained. It was examined that the dominant etching parameter for the selective etchning of ITO on GaAs structure was the chamber pressure. But, the etching selectivity for ITO on InP was poor eventhough we tried systematic etching. RIE etching conditins using CH4/H2 gas was limited due to the formation of polymer on the substrates. In the case of Ar gas for the reactive gas, the selectivity of ITO on BaTiO3 was above 10. The etch rete of ITO was more sensitive to the etching parameters than that of BaTiO3, which was almost constant with different etching parameters.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2002.11a
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• pp.72-81
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• 2002

Management for security product and application is becoming more difficult because they became more specialized. Most of research is focused on combining policies for information security management policy, security standard, and security tools. However, there are no researches for total solution for both application and security policy. Thereby, the purpose of this research is to propose a remote integrated management system based on linux. The system could efficiently manage data update for application and policy update for a server supporting the distinct configuration of each server. By using the remote integrated management system, system manager with poor secure knowledge also could easily manage their system securely.